Title:
EASY-OPEN CONTAINER AND PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/115158
Kind Code:
A1
Abstract:
Disclosed is an easy-open container provided with a container main body (2) having a flange (25) at the periphery of an opening, wherein a surface layer (21) of the container main body (2) on the flange and a seal layer (31) of a lid (3) are annularly heat-sealed, and the sealed portion (26) of at least one of the container main body (2) and the lid (3) is subjected to interfacial peeling or cohesion failure, so that the lid (3) can be opened. The easy-open container is characterized in that, in a first heat-seal step for applying heat-sealing, the lid (3) is placed on the upper surface of the flange (25) of the container main body (1), a first annular sealing board is pressed from above the upper side of the lid (3) toward the upper surface of the flange (25), a torose resin accumulation portion (6) is formed on the flange (25) near a position where the inner periphery of the first annular sealing board abuts the flange (25), and the resin accumulation portion has a specific shape. Taking the continuous productivity into account, it is preferable that a second annular sealing board is pressed from above the lid (3) so that the resin accumulation portion has a specific shape.
Inventors:
SATO Toshiya (1660, Kamiizumi Sodegaura-sh, Chiba 05, 〒2990205, JP)
Application Number:
JP2011/056176
Publication Date:
September 22, 2011
Filing Date:
March 16, 2011
Export Citation:
Assignee:
IDEMITSU UNITECH CO.,LTD. (26-2, Shinkawa 1-chome Chuo-k, Tokyo 33, 〒1040033, JP)
出光ユニテック株式会社 (〒33 東京都中央区新川一丁目２６番２号 Tokyo, 〒1040033, JP)
出光ユニテック株式会社 (〒33 東京都中央区新川一丁目２６番２号 Tokyo, 〒1040033, JP)
International Classes:
B65D77/20; B65D1/00; B65D53/04
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (3rd floor, Ogikubo TM building 26-13, Ogikubo 5-chome, Suginami-k, Tokyo 51, 〒1670051, JP)
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Claims: